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  • MAX1771

    12V or Adjustable, High-Efficiency,Low IQ, Step-Up DC-DC Controller

    標(biāo)簽: 1771 MAX

    上傳時(shí)間: 2016-10-20

    上傳用戶(hù):oyjwle

  • OReilly.Ansible.Up.and.Running

    ansible是目前比較流行的集群管理運(yùn)維工具,本書(shū)介紹的其基礎(chǔ)知識(shí),全英文。

    標(biāo)簽: 運(yùn)維 linux

    上傳時(shí)間: 2018-02-05

    上傳用戶(hù):子非木哉

  • 有限差分法

    function [alpha,N,U]=youxianchafen2(r1,r2,up,under,num,deta)      %[alpha,N,U]=youxianchafen2(a,r1,r2,up,under,num,deta)   %該函數(shù)用有限差分法求解有兩種介質(zhì)的正方形區(qū)域的二維拉普拉斯方程的數(shù)值解   %函數(shù)返回迭代因子、迭代次數(shù)以及迭代完成后所求區(qū)域內(nèi)網(wǎng)格節(jié)點(diǎn)處的值   %a為正方形求解區(qū)域的邊長(zhǎng)   %r1,r2分別表示兩種介質(zhì)的電導(dǎo)率   %up,under分別為上下邊界值   %num表示將區(qū)域每邊的網(wǎng)格剖分個(gè)數(shù)   %deta為迭代過(guò)程中所允許的相對(duì)誤差限      n=num+1; %每邊節(jié)點(diǎn)數(shù)   U(n,n)=0; %節(jié)點(diǎn)處數(shù)值矩陣   N=0; %迭代次數(shù)初值   alpha=2/(1+sin(pi/num));%超松弛迭代因子   k=r1/r2; %兩介質(zhì)電導(dǎo)率之比   U(1,1:n)=up; %求解區(qū)域上邊界第一類(lèi)邊界條件   U(n,1:n)=under; %求解區(qū)域下邊界第一類(lèi)邊界條件   U(2:num,1)=0;U(2:num,n)=0;      for i=2:num   U(i,2:num)=up-(up-under)/num*(i-1);%采用線性賦值對(duì)上下邊界之間的節(jié)點(diǎn)賦迭代初值   end   G=1;   while G>0 %迭代條件:不滿(mǎn)足相對(duì)誤差限要求的節(jié)點(diǎn)數(shù)目G不為零   Un=U; %完成第n次迭代后所有節(jié)點(diǎn)處的值   G=0; %每完成一次迭代將不滿(mǎn)足相對(duì)誤差限要求的節(jié)點(diǎn)數(shù)目歸零   for j=1:n   for i=2:num   U1=U(i,j); %第n次迭代時(shí)網(wǎng)格節(jié)點(diǎn)處的值      if j==1 %第n+1次迭代左邊界第二類(lèi)邊界條件   U(i,j)=1/4*(2*U(i,j+1)+U(i-1,j)+U(i+1,j));   end         if (j>1)&&(j                 U2=1/4*(U(i,j+1)+ U(i-1,j)+ U(i,j-1)+ U(i+1,j));    U(i,j)=U1+alpha*(U2-U1); %引入超松弛迭代因子后的網(wǎng)格節(jié)點(diǎn)處的值      end      if i==n+1-j %第n+1次迭代兩介質(zhì)分界面(與網(wǎng)格對(duì)角線重合)第二類(lèi)邊界條件   U(i,j)=1/4*(2/(1+k)*(U(i,j+1)+U(i+1,j))+2*k/(1+k)*(U(i-1,j)+U(i,j-1)));      end      if j==n %第n+1次迭代右邊界第二類(lèi)邊界條件   U(i,n)=1/4*(2*U(i,j-1)+U(i-1,j)+U(i+1,j));   end   end   end   N=N+1 %顯示迭代次數(shù)   Un1=U; %完成第n+1次迭代后所有節(jié)點(diǎn)處的值   err=abs((Un1-Un)./Un1);%第n+1次迭代與第n次迭代所有節(jié)點(diǎn)值的相對(duì)誤差   err(1,1:n)=0; %上邊界節(jié)點(diǎn)相對(duì)誤差置零   err(n,1:n)=0; %下邊界節(jié)點(diǎn)相對(duì)誤差置零    G=sum(sum(err>deta))%顯示每次迭代后不滿(mǎn)足相對(duì)誤差限要求的節(jié)點(diǎn)數(shù)目G   end

    標(biāo)簽: 有限差分

    上傳時(shí)間: 2018-07-13

    上傳用戶(hù):Kemin

  • JTDX安裝及設(shè)定

    HF通信模式FT-8的中文設(shè)置資料。   軟件是英文的,可在這里下載。http://www.jtdx.tech/en/

    標(biāo)簽: JTDX 設(shè)定

    上傳時(shí)間: 2018-11-23

    上傳用戶(hù):milo

  • matpower軟件下

    http://tech.ifeng.com/a/20161108/44488623_0.shtml

    標(biāo)簽: matpower 軟件

    上傳時(shí)間: 2018-12-20

    上傳用戶(hù):taitai

  • MSP430G2553

    DESCRIPTION The Texas Instruments MSP430 family of ultra-low-power microcontrollers consists of several devices featuring different sets of peripherals targeted for various applications. The architecture, combined with five low-power modes, is optimized to achieve extended battery life in portable measurement applications. The device features a powerful 16-bit RISC CPU, 16-bit registers, and constant generators that contribute to maximum code efficiency. The digitally controlled oscillator (DCO) allows wake-up from low-power modes to active mode in less than 1 μs. The MSP430G2x13 and MSP430G2x53 series are ultra-low-power mixed signal microcontrollers with built-in 16- bit timers, up to 24 I/O capacitive-touch enabled pins, a versatile analog comparator, and built-in communication capability using the universal serial communication interface. In addition the MSP430G2x53 family members have a 10-bit analog-to-digital (A/D) converter. For configuration details see Table 1. Typical applications include low-cost sensor systems that capture analog signals, convert them to digital values, and then process the data for display or for transmission to a host system.

    標(biāo)簽: G2553 2553 430G MSP 430

    上傳時(shí)間: 2018-12-25

    上傳用戶(hù):ygyh

  • L9945

    AEC-Q100 qualified ? 12 V and 24 V battery systems compliance ? 3.3 V and 5 V logic compatible I/O ? 8-channel configurable MOSFET pre-driver – High-side (N-channel and P-channel MOS) – Low-side (N-channel MOS) – H-bridge (up to 2 H-bridge) – Peak & Hold (2 loads) ? Operating battery supply voltage 3.8 V to 36 V ? Operating VDD supply voltage 4.5 V to 5.5 V ? All device pins, except the ground pins, withstand at least 40 V ? Programmable gate charge/discharge currents for improving EMI behavior

    標(biāo)簽: configurable Automotive pre-driver suitable channel systems MOSFET fully High side

    上傳時(shí)間: 2019-03-27

    上傳用戶(hù):guaixiaolong

  • AD8001AR

    transimpedance linearization circuitry. This allows it to drive video loads with excellent differential gain and phase perfor mance on only 50 mW of power. The AD8001 is a current feedback amplifier and features gain flatness of 0.1 dB to 100 MHz while offering differential gain and phase error of 0.01% and 0.025°. This makes the AD8001 ideal for professional video electronics such as cameras and video switchers. Additionally, the AD8001’s low distortion and fast settling make it ideal for buffer high-speed A-to-D converters. The AD8001 offers low power of 5.5 mA max (VS = ±5 V) and can run on a single +12 V power supply, while being capable of delivering over 70 mA of load current. These features make this amplifier ideal for portable and battery-powered applications where size and power are critical. The outstanding bandwidth of 800 MHz along with 1200 V/μs of slew rate make the AD8001 useful in many general purpose high-speed applications where dual power supplies of up to ±6 V and single supplies from 6 V to 12 V are needed. The AD8001 is available in the industrial temperature range of –40°C to +85°C.

    標(biāo)簽: 8001 AD AR

    上傳時(shí)間: 2020-04-21

    上傳用戶(hù):su1254

  • The Cognitive Early Warning Predictive System

    I saw the light of the future when I first read Ray Kurzweil’s best-seller book The Singularity Is Near: When Humans Transcend Biology. One cubic inch of nanotube cir- cuitry, once fully developed, would be up to one hundred million times more powerful than the human brain.

    標(biāo)簽: Predictive Cognitive Warning System Early The

    上傳時(shí)間: 2020-05-26

    上傳用戶(hù):shancjb

  • 3G+Evolution

    During the past years, there has been a quickly rising interest in radio access tech- nologies for providing mobile as well as nomadic and fixed services for voice, video, and data. The difference in design, implementation, and use between telecom and datacom technologies is also getting more blurred. One example is cellular technologies from the telecom world being used for broadband data and wireless LAN from the datacom world being used for voice over IP.

    標(biāo)簽: Evolution 3G

    上傳時(shí)間: 2020-05-26

    上傳用戶(hù):shancjb

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